Incorrect authorization in cert-manager Operator for Red Hat OpenShift - CVE-2026-62290
Published: November 9, 2026
Vulnerability identifier: #VU162676
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62290
CWE-ID: CWE-863
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged local attacker with namespace-level Challenge creation permission to obtain platform-owned acme-dns credentials associated with a usable ClusterIssuer.
The vulnerability exists due to missing authorization validation in cert-manager's ACME Challenge controller when directly created Challenges supply solver configurations outside the referenced ClusterIssuer's policy. A low-privileged local attacker can specify an attacker-controlled acme-dns endpoint, causing the controller to send credentials from the ClusterIssuer resource namespace to that endpoint.
Affected software
cert-manager Operator for Red Hat OpenShift
How to mitigate CVE-2026-62290
Install security update from vendor's website.
cert-manager Operator for Red Hat OpenShift - addressed in versions 1.19.6, 1.20.3